Thursday, March 22, 2012

Nicely made and anodised captive nuts, courtesy David Lawry.

Michel Colomban advises abrading the surface prior to gluing with anodised materials, however, I just read this from the EAA Experimenter Newsletter:

ANODIZE - or anodising, is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. Anodizing increases corrosion resistance and wear resistance, and provides better adhesion for paint primers and glues than bare metal. Anodic films can also be used for a number of cosmetic effects, either with thick porous coatings that can absorb dyes or with thin transparent coatings that add interference effects to reflected light. Anodizing is also used to prevent galling of threaded components and to make dielectric films for electrolytic capacitors. Anodic films are most commonly applied to protect aluminium alloys, although processes also exist for titanium, zinc, magnesium, and niobium.

But I’ll probably lean towards M. Colomban’s recommendations.